I'm dropping these in my 06 Civic Sedan in a week to see if the rear clunk goes away. Performance wise did you feel anything? I'm kinda exited to install these lol.Same thing has been happening to me but on my 07 si tho. I changed the rear shock bushings with the Energy Suspension 16.8112 set. Turns on my old ones were so worn when I would tighten the shock bolt the old bushing would keep spinning. So when I did my truhart shocks recently it was never fully tight. I also had a leak in the trunk that went away.... I think, will check tomorrow.